Difference between revisions of "GeoView"

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=== mandriva ===

Revision as of 10:47, 25 December 2008

Work in progress.

All we need to understand and test GeoView.


Why GeoView ?

I would like to see my ancestors all around the world on a map. And if possible, I would like to see them moving during time periods.

How to do this easily and with the minimum of software to install ?

GeoView is one solution. You can always provide yours !

The html kits

We can use webkit or gtkmozembed to view html pages. If no one is installed, you'll never see GeoView.

If the two kits are installed, webkit will be used.

For web browsing, we need to be connected to the network.

Even if you have a html kit installed, can can always say : I don't mind ! I don't want to see the HtmlView.

For this, you can disallow Geoview in the Internet Maps preferences tab.

WebKit

It's the future. Be aware, WebKit is always in development. I already test this with segmentation fault, ...

More and more projects are integrating webkit ...

The reason why for epiphany :

http://blogs.gnome.org/epiphany/2008/04/01/the-future-of-epiphany/

Proxies

WebKit uses the libsoup library. You need the environment variable http_proxy.

Gecko ( GtkMozEmbed )

What will gtkmozembed be in the future ?

The embedding API of Gecko (GtkMozEmbed) has been unmaintained and stagnant for a long time.

Proxies

GtkMozEmbed is proxy aware. I implement this and I use the http_proxy environment variable. Authentication is allowed. The http_proxy format used is :

http://[user:[email protected]]proxy:port/

To confirm : We need to use gnome-control-center to set the proxy.

The maps providers

There are a lot of providers. Some are free.

By default, the provider is OSM ( OpenStreetMap ).

This provider depends on the community and the maps are very light depending on the country. Nevertheless, the community made an extraordinary job since a few month. We can say OpenStreetMap is and will be the map for gramps.

Openlayers is free too and uses by default OSM map. A lot of private or non free maps depends on OpenLayers.

The most interesting is the IGN ( Institut Géographique National Français ) which offers an old map of France ( about 1780 ) but this provider needs a key. I'll speek about keys later.

You have Googlemaps, Yahoo! maps, Microsoft maps, ...

mapstraction

Like you can see, it's impossible to implement all providers maps. For this reason, some people created an api over all these providers api.

With only a few modification, you can use the map you want. And better! you can switch between the maps keeping the zoom and the centered position.

It's also in the development phase and is sometimes buggy.

The provider Key

Gramps is not a web site. Keys are only for web site. In GeoView, I use a specific functionality : We are working on local file instead of url, so we don't need a key. some providers like IGN needs key even in this case. So I can't use them. Why ?

  1. Too complex for final user's.
  2. We need a key by provider

In these case, I hope you understand the choice is limited even is mapstraction can do more.

Constraint

We have no key, so we have a restricted access : About 10,000 to 15,000 requests by IP per day depending on the provider.

What is a request ? As I understand with the IGN ( OpenLayers ), a request is a tile ( an image ). You need several tiles for a view.

I think it is sufficient for the lambda genealogist.

The proxies

Everybody doesn't need a proxy. The majority of us are connected directly to internet. In this case, forget all this.

You need a proxy only if you installed one or if you depend on some fai which provides one.

How to get the html kits ?

It depends on the distribution you're working on ! They are listed in reverse order.

python-webkitgtk is also called pywebkitgtk

ubuntu

webkit

You needs libwebkit and python-webkitgtk.

Add to the /etc/apt/sources.list :

# for python-webkitgtk
deb http://ppa.launchpad.net/gwibber-team/ubuntu hardy main
# for libwebkit
deb http://ppa.launchpad.net/webkit-team/ubuntu hardy main

It's from nightly builds, so it can crash.

If you have some crash and want to install the working package, you can get libwebkit from the following url :

https://edge.launchpad.net/~stemp/+archive

gecko

If you want gtkmozembed on ubuntu, you must install : python-gnome2-extras

It's stable but install many gnome packages even if you are on a kde based distribution.

Please, don't troll !

suse

webkit

libwebkit-1_0

I didn't test GeoView on suse or opensuse. I need some feedback.

I found on example in : ftp5.gwdg.de/pub/opensuse/repositories/home:/bmotmans/openSUSE_<VERSION>/<ARCH>/

Replace <VERSION> by the fedora version you use. ie : Factory, 10.3, 1.0, ...

Replace <ARCH> by i586, x86_64, ...

pywebkit

http://packages.opensuse-community.org/index.jsp?searchTerm=pywebkit

gecko

mandriva

webkit

gecko

fedora

webkit

You must use : WebKit-gtk

I didn't test GeoView on Fedora. I need some feedback.

http://download.fedora.redhat.com/pub/fedora/linux/releases/<VERSION>/Everything/<ARCH>/os/Packages/

Replace <VERSION> by the fedora version you use. ie : 7, 9, 10, ...

Replace <ARCH> by i386, x86_64, ...

gecko

debian

webkit

This is the same packager for ubuntu and debian, so go to the ubuntu paragraph.

gecko

install the python-gtkmozembed package.

windows XP/Vista

I don't know who is the windows packager for libwebkit and python-webkitgtk or pywebkitgtk.

<SMILE>

Perhaps it will be a good way to go to Linux !

</SMILE>

...

Your modifications are welcomed ...